Rules.mak 24 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546547548549550551552553554555556557558559560561562563564565566567568569570571572573574575576577578579580581582583584585586587588589590591592593594595596597598599600601602603604605606607608609610611612613614615616617618619620621622623624625626627628629630631632633634635636637638639640641642643644645646647648649650651652653654655656657658659660661662663664665666667668669670671672673674675676677678679680681682683684685686687688689690691692693694695696697698699700701702703704705706707708709710711712713714715716717718719720721722723724725726727728729730731
  1. # Rules.make for uClibc
  2. #
  3. # Copyright (C) 2000-2008 Erik Andersen <andersen@uclibc.org>
  4. #
  5. # Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
  6. #
  7. # make nano-doc
  8. # FOO = bar -- recursively expanded variable. Value is remebered verbatim.
  9. # If it contains references to other variables, these references
  10. # are expanded whenever this variable is _substituted_.
  11. # FOO := bar -- simply expanded variable. Right hand is expanded when
  12. # the variable is _defined_. Therefore faster than =.
  13. # FOO ?= bar -- set a value only if it is not already set
  14. # (behaves as =, not :=).
  15. # FOO += bar -- append; if FOO is not defined, acts like = (not :=).
  16. # check for proper make version
  17. ifneq ($(findstring x3.7,x$(MAKE_VERSION)),)
  18. $(error Your make is too old $(MAKE_VERSION). Go get at least 3.80)
  19. endif
  20. #-----------------------------------------------------------
  21. # This file contains rules which are shared between multiple
  22. # Makefiles. All normal configuration options live in the
  23. # file named ".config". Don't mess with this file unless
  24. # you know what you are doing.
  25. #-----------------------------------------------------------
  26. # If you are running a cross compiler, you will want to set
  27. # 'CROSS_COMPILE' to something more interesting ... Target
  28. # architecture is determined by asking the CC compiler what
  29. # arch it compiles things for, so unless your compiler is
  30. # broken, you should not need to specify TARGET_ARCH.
  31. #
  32. # Most people will set this stuff on the command line, i.e.
  33. # make CROSS_COMPILE=arm-linux-
  34. # will build uClibc for 'arm'.
  35. # CROSS is still supported for backward compatibily only
  36. CROSS_COMPILE ?= $(CROSS)
  37. CC = $(CROSS_COMPILE)gcc
  38. AR = $(CROSS_COMPILE)ar
  39. LD = $(CROSS_COMPILE)ld
  40. NM = $(CROSS_COMPILE)nm
  41. OBJDUMP = $(CROSS_COMPILE)objdump
  42. STRIPTOOL = $(CROSS_COMPILE)strip
  43. INSTALL = install
  44. LN = ln
  45. RM = rm -f
  46. TAR = tar
  47. SED = sed
  48. AWK = awk
  49. STRIP_FLAGS ?= -x -R .note -R .comment
  50. ## unused? if yes, remove after 0.9.31
  51. ## UNIFDEF := $(top_builddir)extra/scripts/unifdef
  52. # Select the compiler needed to build binaries for your development system
  53. HOSTCC = gcc
  54. BUILD_CFLAGS = -Os -Wall
  55. #---------------------------------------------------------
  56. # Nothing beyond this point should ever be touched by mere
  57. # mortals. Unless you hang out with the gods, you should
  58. # probably leave all this stuff alone.
  59. # strip quotes
  60. qstrip = $(strip $(subst ",,$(1)))
  61. #"))
  62. # Pull in the user's uClibc configuration
  63. ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),)
  64. -include $(top_builddir).config
  65. endif
  66. TARGET_ARCH:=$(call qstrip,$(TARGET_ARCH))
  67. ifeq ($(TARGET_ARCH),)
  68. ARCH ?= $(shell uname -m | $(SED) -e s/i.86/i386/ \
  69. -e s/sun.*/sparc/ -e s/sparc.*/sparc/ \
  70. -e s/arm.*/arm/ -e s/sa110/arm/ \
  71. -e s/sh.*/sh/ \
  72. -e s/s390x/s390/ -e s/parisc.*/hppa/ \
  73. -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
  74. -e s/xtensa.*/xtensa/ )
  75. else
  76. ARCH = $(TARGET_ARCH)
  77. endif
  78. export ARCH
  79. # Make certain these contain a final "/", but no "//"s.
  80. TARGET_SUBARCH:=$(call qstrip,$(TARGET_SUBARCH))
  81. RUNTIME_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(call qstrip,$(RUNTIME_PREFIX)))))
  82. DEVEL_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(call qstrip,$(DEVEL_PREFIX)))))
  83. MULTILIB_DIR:=$(strip $(subst //,/, $(subst ,/, $(call qstrip,$(MULTILIB_DIR)))))
  84. KERNEL_HEADERS:=$(strip $(subst //,/, $(subst ,/, $(call qstrip,$(KERNEL_HEADERS)))))
  85. export RUNTIME_PREFIX DEVEL_PREFIX KERNEL_HEADERS MULTILIB_DIR
  86. # Now config hard core
  87. MAJOR_VERSION := 0
  88. MINOR_VERSION := 9
  89. SUBLEVEL := 33
  90. EXTRAVERSION :=-rc1-git
  91. VERSION := $(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL)
  92. ABI_VERSION := $(MAJOR_VERSION)
  93. ifneq ($(EXTRAVERSION),)
  94. VERSION := $(VERSION)$(EXTRAVERSION)
  95. endif
  96. # Ensure consistent sort order, 'gcc -print-search-dirs' behavior, etc.
  97. LC_ALL := C
  98. export MAJOR_VERSION MINOR_VERSION SUBLEVEL VERSION ABI_VERSION LC_ALL
  99. LIBC := libc
  100. SHARED_LIBNAME := $(LIBC).so.$(ABI_VERSION)
  101. UBACKTRACE_DSO := libubacktrace.so.$(ABI_VERSION)
  102. ifneq ($(findstring $(TARGET_ARCH) , hppa64 ia64 mips64 powerpc64 s390x sparc64 x86_64 ),)
  103. UCLIBC_LDSO_NAME := ld64-uClibc
  104. ARCH_NATIVE_BIT := 64
  105. else
  106. UCLIBC_LDSO_NAME := ld-uClibc
  107. ARCH_NATIVE_BIT := 32
  108. endif
  109. UCLIBC_LDSO := $(UCLIBC_LDSO_NAME).so.$(ABI_VERSION)
  110. NONSHARED_LIBNAME := uclibc_nonshared.a
  111. libc := $(top_builddir)lib/$(SHARED_LIBNAME)
  112. libc.depend := $(top_builddir)lib/$(SHARED_LIBNAME:.$(ABI_VERSION)=)
  113. ifneq ($(ARCH_HAS_NO_SHARED),y)
  114. libdl.depend := $(top_builddir)lib/libdl.so
  115. endif
  116. ifneq ($(HAS_NO_THREADS),y)
  117. libpthread.depend := $(top_builddir)lib/libpthread.so
  118. endif
  119. interp := $(top_builddir)lib/interp.os
  120. ldso := $(top_builddir)lib/$(UCLIBC_LDSO)
  121. headers_dep := $(top_builddir)include/bits/sysnum.h
  122. sub_headers := $(headers_dep)
  123. #LIBS :=$(interp) -L$(top_builddir)lib -lc
  124. LIBS := $(interp) -L$(top_builddir)lib $(libc:.$(ABI_VERSION)=)
  125. # Make sure DESTDIR and PREFIX can be used to install
  126. # PREFIX is a uClibcism while DESTDIR is a common GNUism
  127. ifndef PREFIX
  128. PREFIX = $(DESTDIR)
  129. endif
  130. ifneq ($(HAVE_SHARED),y)
  131. libc :=
  132. interp :=
  133. ldso :=
  134. endif
  135. comma:=,
  136. space:= #
  137. ifndef CROSS_COMPILE
  138. CROSS_COMPILE=$(call qstrip,$(CROSS_COMPILER_PREFIX))
  139. endif
  140. # A nifty macro to make testing gcc features easier
  141. check_gcc=$(shell \
  142. if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; \
  143. then echo "$(1)"; else echo "$(2)"; fi)
  144. check_as=$(shell \
  145. if $(CC) -Wa,$(1) -Wa,-Z -c -o /dev/null -xassembler /dev/null > /dev/null 2>&1; \
  146. then echo "-Wa,$(1)"; fi)
  147. check_ld=$(shell \
  148. if $(LD) $(1) -o /dev/null -b binary /dev/null > /dev/null 2>&1; \
  149. then echo "$(1)"; fi)
  150. ARFLAGS:=cr
  151. # Flags in OPTIMIZATION are used only for non-debug builds
  152. OPTIMIZATION:=
  153. # Use '-Os' optimization if available, else use -O2, allow Config to override
  154. OPTIMIZATION+=$(call check_gcc,-Os,-O2)
  155. # Use the gcc 3.4 -funit-at-a-time optimization when available
  156. OPTIMIZATION+=$(call check_gcc,-funit-at-a-time,)
  157. # shrinks code by about 0.1%
  158. OPTIMIZATION+=$(call check_gcc,-fmerge-all-constants)
  159. OPTIMIZATION+=$(call check_gcc,-fstrict-aliasing)
  160. GCC_MAJOR_VER?=$(shell $(CC) -dumpversion | cut -d . -f 1)
  161. #GCC_MINOR_VER?=$(shell $(CC) -dumpversion | cut -d . -f 2)
  162. ifeq ($(GCC_MAJOR_VER),4)
  163. # shrinks code, results are from 4.0.2
  164. # 0.36%
  165. OPTIMIZATION+=$(call check_gcc,-fno-tree-loop-optimize,)
  166. # 0.34%
  167. OPTIMIZATION+=$(call check_gcc,-fno-tree-dominator-opts,)
  168. # 0.1%
  169. OPTIMIZATION+=$(call check_gcc,-fno-strength-reduce,)
  170. endif
  171. # CPU_CFLAGS-y contain options which are not warnings,
  172. # not include or library paths, and not optimizations.
  173. # Why -funsigned-char: I hunted a bug related to incorrect
  174. # sign extension of 'char' type for 10 hours straight. Not fun.
  175. CPU_CFLAGS-y := -funsigned-char -fno-builtin
  176. CPU_CFLAGS-y += $(call check_gcc,-fno-asm,)
  177. LDADD_LIBFLOAT=
  178. ifeq ($(UCLIBC_HAS_SOFT_FLOAT),y)
  179. # If -msoft-float isn't supported, we want an error anyway.
  180. # Hmm... might need to revisit this for arm since it has 2 different
  181. # soft float encodings.
  182. ifneq ($(TARGET_ARCH),nios)
  183. ifneq ($(TARGET_ARCH),nios2)
  184. ifneq ($(TARGET_ARCH),sh)
  185. ifneq ($(TARGET_ARCH),c6x)
  186. CPU_CFLAGS-y += -msoft-float
  187. endif
  188. endif
  189. endif
  190. endif
  191. ifeq ($(TARGET_ARCH),arm)
  192. # No longer needed with current toolchains, but leave it here for now.
  193. # If anyone is actually still using gcc 2.95 (say), they can uncomment it.
  194. # LDADD_LIBFLOAT=-lfloat
  195. endif
  196. endif
  197. CPU_CFLAGS-y += $(call check_gcc,-std=gnu99,)
  198. CPU_CFLAGS-$(UCLIBC_FORMAT_SHARED_FLAT) += -mid-shared-library
  199. CPU_CFLAGS-$(UCLIBC_FORMAT_FLAT_SEP_DATA) += -msep-data
  200. CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN) += -Wl,-EL
  201. CPU_LDFLAGS-$(ARCH_BIG_ENDIAN) += -Wl,-EB
  202. PICFLAG-y := -fPIC
  203. PICFLAG-$(UCLIBC_FORMAT_FDPIC_ELF) := -mfdpic
  204. PICFLAG-$(UCLIBC_FORMAT_DSBT_ELF) := -mdsbt -fpic
  205. PICFLAG := $(PICFLAG-y)
  206. PIEFLAG_NAME:=-fPIE
  207. # Some nice CPU specific optimizations
  208. ifeq ($(TARGET_ARCH),i386)
  209. OPTIMIZATION+=$(call check_gcc,-fomit-frame-pointer,)
  210. ifeq ($(CONFIG_386)$(CONFIG_486)$(CONFIG_586)$(CONFIG_586MMX),y)
  211. # Non-SSE capable processor.
  212. # NB: this may make SSE insns segfault!
  213. # -O1 -march=pentium3, -Os -msse etc are known to be affected.
  214. # See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13685
  215. # -m32 is needed if host is 64-bit
  216. OPTIMIZATION+=$(call check_gcc,-m32 -mpreferred-stack-boundary=2,)
  217. else
  218. OPTIMIZATION+=$(call check_gcc,-mpreferred-stack-boundary=4,)
  219. endif
  220. # Choice of alignment (please document why!)
  221. # -falign-labels: in-line labels
  222. # (reachable by normal code flow, aligning will insert nops
  223. # which will be executed - may even make things slower)
  224. # -falign-jumps: reachable only by a jump
  225. # Generic: no alignment at all (smallest code)
  226. GCC_FALIGN=$(call check_gcc,-falign-functions=1 -falign-jumps=1 -falign-labels=1 -falign-loops=1,-malign-jumps=1 -malign-loops=1)
  227. ifeq ($(CONFIG_K7),y)
  228. # Align functions to four bytes, use default for jumps and loops (why?)
  229. GCC_FALIGN=$(call check_gcc,-falign-functions=4 -falign-labels=1,-malign-functions=4)
  230. endif
  231. ifeq ($(CONFIG_CRUSOE),y)
  232. # Use compiler's default for functions, jumps and loops (why?)
  233. GCC_FALIGN=$(call check_gcc,-falign-functions=0 -falign-labels=1,-malign-functions=0)
  234. endif
  235. ifeq ($(CONFIG_CYRIXIII),y)
  236. # Use compiler's default for functions, jumps and loops (why?)
  237. GCC_FALIGN=$(call check_gcc,-falign-functions=0 -falign-labels=1,-malign-functions=0)
  238. endif
  239. OPTIMIZATION+=$(GCC_FALIGN)
  240. # Putting each function and data object into its own section
  241. # allows for kbytes of less text if users link against static uclibc
  242. # using ld --gc-sections.
  243. # ld 2.18 can't do that (yet?) for shared libraries, so we itself
  244. # do not use --gc-sections at shared lib link time.
  245. # However, in combination with sections being sorted by alignment
  246. # it does result in much reduced padding:
  247. # text data bss dec hex
  248. # 235319 1472 5992 242783 3b45f old.so
  249. # 234104 1472 5980 241556 3af94 new.so
  250. # Without -ffunction-sections, all functions will get aligned
  251. # to 4 byte boundary by as/ld. This is arguably a bug in as.
  252. # It specifies 4 byte align for .text even if not told to do so:
  253. # Idx Name Size VMA LMA File off Algn
  254. # 0 .text xxxxxxxx 00000000 00000000 xxxxxxxx 2**2 <===!
  255. CPU_CFLAGS-y += $(call check_gcc,-ffunction-sections -fdata-sections,)
  256. ifneq ($(call check_ld,--sort-common),)
  257. CPU_LDFLAGS-y += -Wl,--sort-common
  258. endif
  259. ifneq ($(call check_ld,--sort-section alignment),)
  260. CPU_LDFLAGS-y += -Wl,--sort-section,alignment
  261. endif
  262. CPU_LDFLAGS-y+=-m32
  263. CPU_CFLAGS-y+=-m32
  264. CPU_CFLAGS-$(CONFIG_386)+=-march=i386
  265. CPU_CFLAGS-$(CONFIG_486)+=-march=i486
  266. CPU_CFLAGS-$(CONFIG_ELAN)+=-march=i486
  267. CPU_CFLAGS-$(CONFIG_586)+=-march=i586
  268. CPU_CFLAGS-$(CONFIG_586MMX)+=$(call check_gcc,-march=pentium-mmx,-march=i586)
  269. CPU_CFLAGS-$(CONFIG_686)+=-march=i686
  270. CPU_CFLAGS-$(CONFIG_PENTIUMII)+=$(call check_gcc,-march=pentium2,-march=i686)
  271. CPU_CFLAGS-$(CONFIG_PENTIUMIII)+=$(call check_gcc,-march=pentium3,-march=i686)
  272. CPU_CFLAGS-$(CONFIG_PENTIUM4)+=$(call check_gcc,-march=pentium4,-march=i686)
  273. CPU_CFLAGS-$(CONFIG_K6)+=$(call check_gcc,-march=k6,-march=i586)
  274. CPU_CFLAGS-$(CONFIG_K7)+=$(call check_gcc,-march=athlon,-march=i686)
  275. CPU_CFLAGS-$(CONFIG_CRUSOE)+=-march=i686
  276. CPU_CFLAGS-$(CONFIG_WINCHIPC6)+=$(call check_gcc,-march=winchip-c6,-march=i586)
  277. CPU_CFLAGS-$(CONFIG_WINCHIP2)+=$(call check_gcc,-march=winchip2,-march=i586)
  278. CPU_CFLAGS-$(CONFIG_CYRIXIII)+=$(call check_gcc,-march=c3,-march=i486)
  279. CPU_CFLAGS-$(CONFIG_NEHEMIAH)+=$(call check_gcc,-march=c3-2,-march=i686)
  280. endif
  281. ifeq ($(TARGET_ARCH),sparc)
  282. CPU_CFLAGS-$(CONFIG_SPARC_V7)+=-mcpu=v7
  283. CPU_CFLAGS-$(CONFIG_SPARC_V8)+=-mcpu=v8
  284. CPU_CFLAGS-$(CONFIG_SPARC_V9)+=-mcpu=v9
  285. CPU_CFLAGS-$(CONFIG_SPARC_V9B)+=$(call check_gcc,-mcpu=v9b,-mcpu=ultrasparc)
  286. endif
  287. ifeq ($(TARGET_ARCH),arm)
  288. CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-mlittle-endian
  289. CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mbig-endian
  290. CPU_CFLAGS-$(COMPILE_IN_THUMB_MODE)+=-mthumb
  291. endif
  292. ifeq ($(TARGET_ARCH),mips)
  293. OPTIMIZATION+=-mno-split-addresses
  294. CPU_CFLAGS-$(CONFIG_MIPS_ISA_1)+=-mips1
  295. CPU_CFLAGS-$(CONFIG_MIPS_ISA_2)+=-mips2 -mtune=mips2
  296. CPU_CFLAGS-$(CONFIG_MIPS_ISA_3)+=-mips3 -mtune=mips3
  297. CPU_CFLAGS-$(CONFIG_MIPS_ISA_4)+=-mips4 -mtune=mips4
  298. CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS32)+=-mips32 -mtune=mips32
  299. CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS32R2)+=-march=mips32r2 -mtune=mips32r2
  300. CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS64)+=-mips64 -mtune=mips32
  301. ifeq ($(strip $(ARCH_BIG_ENDIAN)),y)
  302. CPU_LDFLAGS-$(CONFIG_MIPS_N64_ABI)+=-Wl,-melf64btsmip
  303. CPU_LDFLAGS-$(CONFIG_MIPS_O32_ABI)+=-Wl,-melf32btsmip
  304. endif
  305. ifeq ($(strip $(ARCH_LITTLE_ENDIAN)),y)
  306. CPU_LDFLAGS-$(CONFIG_MIPS_N64_ABI)+=-Wl,-melf64ltsmip
  307. CPU_LDFLAGS-$(CONFIG_MIPS_O32_ABI)+=-Wl,-melf32ltsmip
  308. endif
  309. CPU_CFLAGS-$(CONFIG_MIPS_N64_ABI)+=-mabi=64
  310. CPU_CFLAGS-$(CONFIG_MIPS_O32_ABI)+=-mabi=32
  311. CPU_CFLAGS-$(CONFIG_MIPS_N32_ABI)+=-mabi=n32
  312. endif
  313. ifeq ($(TARGET_ARCH),nios)
  314. OPTIMIZATION+=-funaligned-struct-hack
  315. CPU_LDFLAGS-y+=-Wl,-m32
  316. CPU_CFLAGS-y+=-Wl,-m32
  317. endif
  318. ifeq ($(TARGET_ARCH),sh)
  319. OPTIMIZATION+= $(call check_gcc,-mprefergot,)
  320. CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-ml
  321. CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mb
  322. CPU_CFLAGS-$(CONFIG_SH2)+=-m2
  323. CPU_CFLAGS-$(CONFIG_SH3)+=-m3
  324. ifeq ($(UCLIBC_HAS_FPU),y)
  325. CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a
  326. CPU_CFLAGS-$(CONFIG_SH4)+=-m4
  327. else
  328. CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a-nofpu
  329. CPU_CFLAGS-$(CONFIG_SH4)+=-m4-nofpu
  330. endif
  331. endif
  332. ifeq ($(TARGET_ARCH),sh64)
  333. CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN):=-ml
  334. CPU_CFLAGS-$(ARCH_BIG_ENDIAN):=-mb
  335. CPU_CFLAGS-$(CONFIG_SH5)+=-m5-32media
  336. endif
  337. ifeq ($(TARGET_ARCH),h8300)
  338. SYMBOL_PREFIX=_
  339. CPU_LDFLAGS-$(CONFIG_H8300H)+= -Wl,-ms8300h
  340. CPU_LDFLAGS-$(CONFIG_H8S) += -Wl,-ms8300s
  341. CPU_CFLAGS-$(CONFIG_H8300H) += -mh -mint32
  342. CPU_CFLAGS-$(CONFIG_H8S) += -ms -mint32
  343. endif
  344. ifeq ($(TARGET_ARCH),i960)
  345. OPTIMIZATION+=-mh -mint32 #-fsigned-char
  346. endif
  347. ifeq ($(TARGET_ARCH),e1)
  348. OPTIMIZATION+=-mgnu-param
  349. endif
  350. ifeq ($(TARGET_ARCH),cris)
  351. CPU_LDFLAGS-$(CONFIG_CRIS)+=-Wl,-mcrislinux
  352. CPU_LDFLAGS-$(CONFIG_CRISV32)+=-Wl,-mcrislinux
  353. CPU_CFLAGS-$(CONFIG_CRIS)+=-mlinux
  354. PICFLAG:=-fpic
  355. PIEFLAG_NAME:=-fpie
  356. endif
  357. ifeq ($(TARGET_ARCH),m68k)
  358. # -fPIC is only supported for 68020 and above. It is not supported
  359. # for 68000, 68010, or Coldfire.
  360. PICFLAG:=-fpic
  361. PIEFLAG_NAME:=-fpie
  362. endif
  363. ifeq ($(TARGET_ARCH),powerpc)
  364. # PowerPC can hold 8192 entries in its GOT with -fpic which is more than
  365. # enough. Therefore use -fpic which will reduce code size and generates
  366. # faster code.
  367. PICFLAG:=-fpic
  368. PIEFLAG_NAME:=-fpie
  369. PPC_HAS_REL16:=$(shell echo -e "\t.text\n\taddis 11,30,_GLOBAL_OFFSET_TABLE_-.@ha" | $(CC) -c -x assembler -o /dev/null - 2> /dev/null && echo -n y || echo -n n)
  370. CPU_CFLAGS-$(PPC_HAS_REL16)+= -DHAVE_ASM_PPC_REL16
  371. CPU_CFLAGS-$(CONFIG_E500) += "-D__NO_MATH_INLINES"
  372. endif
  373. ifeq ($(TARGET_ARCH),bfin)
  374. SYMBOL_PREFIX=_
  375. ifeq ($(UCLIBC_FORMAT_FDPIC_ELF),y)
  376. CPU_CFLAGS-y:=-mfdpic
  377. CPU_LDFLAGS-y += -Wl,-melf32bfinfd
  378. PICFLAG:=-fpic
  379. PIEFLAG_NAME:=-fpie
  380. endif
  381. ifeq ($(UCLIBC_FORMAT_SHARED_FLAT),y)
  382. PICFLAG := -mleaf-id-shared-library
  383. endif
  384. endif
  385. ifeq ($(TARGET_ARCH),frv)
  386. CPU_LDFLAGS-$(CONFIG_FRV)+=-Wl,-melf32frvfd
  387. # Using -pie causes the program to have an interpreter, which is
  388. # forbidden, so we must make do with -shared. Unfortunately,
  389. # -shared by itself would get us global function descriptors
  390. # and calls through PLTs, dynamic resolution of symbols, etc,
  391. # which would break as well, but -Bsymbolic comes to the rescue.
  392. export LDPIEFLAG:=-shared -Wl,-Bsymbolic
  393. UCLIBC_LDSO=ld.so.1
  394. endif
  395. ifeq ($(strip $(TARGET_ARCH)),avr32)
  396. CPU_CFLAGS-$(CONFIG_AVR32_AP7) += -march=ap
  397. CPU_CFLAGS-$(CONFIG_LINKRELAX) += -mrelax
  398. CPU_LDFLAGS-$(CONFIG_LINKRELAX) += --relax
  399. endif
  400. ifeq ($(TARGET_ARCH),i960)
  401. SYMBOL_PREFIX=_
  402. endif
  403. ifeq ($(TARGET_ARCH),v850)
  404. SYMBOL_PREFIX=_
  405. endif
  406. ifeq ($(TARGET_ARCH),c6x)
  407. PIEFLAG:=
  408. CPU_CFLAGS-$(CONFIG_TMS320C64X) += -march=c64x
  409. CPU_CFLAGS-$(CONFIG_TMS320C64XPLUS) += -march=c64x+
  410. CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-mlittle-endian
  411. CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mbig-endian
  412. CPU_LDFLAGS-y += $(CPU_CFLAGS)
  413. endif
  414. # Keep the check_gcc from being needlessly executed
  415. ifndef PIEFLAG
  416. export PIEFLAG:=$(call check_gcc,$(PIEFLAG_NAME),$(PICFLAG))
  417. endif
  418. # We need to keep track of both the CC PIE flag (above) as
  419. # well as the LD PIE flag (below) because we can't rely on
  420. # gcc passing -pie if we used -fPIE. We need to directly use -pie
  421. # instead of -Wl,-pie as gcc picks up the wrong startfile/endfile
  422. ifndef LDPIEFLAG
  423. export LDPIEFLAG:=$(shell $(LD) --help 2>/dev/null | grep -q -- -pie && echo "-pie")
  424. endif
  425. # Check for --as-needed support in linker
  426. ifndef LD_FLAG_ASNEEDED
  427. _LD_FLAG_ASNEEDED:=$(shell $(LD) --help 2>/dev/null | grep -- --as-needed)
  428. ifneq ($(_LD_FLAG_ASNEEDED),)
  429. export LD_FLAG_ASNEEDED:=--as-needed
  430. endif
  431. endif
  432. ifndef LD_FLAG_NO_ASNEEDED
  433. ifdef LD_FLAG_ASNEEDED
  434. export LD_FLAG_NO_ASNEEDED:=--no-as-needed
  435. endif
  436. endif
  437. ifndef CC_FLAG_ASNEEDED
  438. ifdef LD_FLAG_ASNEEDED
  439. export CC_FLAG_ASNEEDED:=-Wl,$(LD_FLAG_ASNEEDED)
  440. endif
  441. endif
  442. ifndef CC_FLAG_NO_ASNEEDED
  443. ifdef LD_FLAG_NO_ASNEEDED
  444. export CC_FLAG_NO_ASNEEDED:=-Wl,$(LD_FLAG_NO_ASNEEDED)
  445. endif
  446. endif
  447. link.asneeded = $(if $(findstring yy,$(CC_FLAG_ASNEEDED)$(CC_FLAG_NO_ASNEEDED)),$(CC_FLAG_ASNEEDED) $(1) $(CC_FLAG_NO_ASNEEDED))
  448. # Check for AS_NEEDED support in linker script (binutils>=2.16.1 has it)
  449. ifndef ASNEEDED
  450. export ASNEEDED:=$(shell $(LD) --help 2>/dev/null | grep -q -- --as-needed && echo "AS_NEEDED ( $(UCLIBC_LDSO) )" || echo "$(UCLIBC_LDSO)")
  451. ifeq ($(UCLIBC_HAS_BACKTRACE),y)
  452. # Only used in installed libc.so linker script
  453. UBACKTRACE_FULL_NAME := $(RUNTIME_PREFIX)lib/$(UBACKTRACE_DSO)
  454. export UBACKTRACE_ASNEEDED:=$(shell $(LD) --help 2>/dev/null | grep -q -- --as-needed && echo "AS_NEEDED ( $(UBACKTRACE_FULL_NAME) )" || echo "$(UBACKTRACE_FULL_NAME)")
  455. else
  456. export UBACKTRACE_ASNEEDED:=""
  457. endif
  458. endif
  459. # Add a bunch of extra pedantic annoyingly strict checks
  460. XWARNINGS=$(call qstrip,$(WARNINGS))
  461. XWARNINGS+=$(foreach w,\
  462. -Wstrict-prototypes \
  463. -Wstrict-aliasing \
  464. , $(call check_gcc,$(w),))
  465. ifeq ($(EXTRA_WARNINGS),y)
  466. XWARNINGS+=$(foreach w,\
  467. -Wformat=2 \
  468. -Wmissing-noreturn \
  469. -Wmissing-format-attribute \
  470. -Wmissing-prototypes \
  471. -Wmissing-declarations \
  472. -Wnested-externs \
  473. -Wnonnull \
  474. -Wold-style-declaration \
  475. -Wold-style-definition \
  476. -Wshadow \
  477. -Wundef \
  478. , $(call check_gcc,$(w),))
  479. # Works only w/ gcc-3.4 and up, can't be checked for gcc-3.x w/ check_gcc()
  480. #XWARNINGS+=-Wdeclaration-after-statement
  481. endif
  482. CPU_CFLAGS=$(call qstrip,$(CPU_CFLAGS-y))
  483. SSP_DISABLE_FLAGS ?= $(call check_gcc,-fno-stack-protector,)
  484. ifeq ($(UCLIBC_BUILD_SSP),y)
  485. SSP_CFLAGS := $(call check_gcc,-fno-stack-protector-all,)
  486. SSP_CFLAGS += $(call check_gcc,-fstack-protector,)
  487. SSP_ALL_CFLAGS ?= $(call check_gcc,-fstack-protector-all,)
  488. else
  489. SSP_CFLAGS := $(SSP_DISABLE_FLAGS)
  490. endif
  491. NOSTDLIB_CFLAGS:=$(call check_gcc,-nostdlib,)
  492. # Collect all CFLAGS components
  493. CFLAGS := -include $(top_srcdir)include/libc-symbols.h \
  494. $(XWARNINGS) $(CPU_CFLAGS) $(SSP_CFLAGS) \
  495. -nostdinc -I$(top_builddir)include -I$(top_srcdir)include -I. \
  496. -I$(top_srcdir)libc/sysdeps/linux \
  497. -I$(top_srcdir)libc/sysdeps/linux/$(TARGET_ARCH)
  498. # We need this to be checked within libc-symbols.h
  499. ifneq ($(HAVE_SHARED),y)
  500. CFLAGS += -DSTATIC
  501. endif
  502. LDFLAG_WARN_ONCE:=$(if $(call check_ld,--warn-once),-Wl$(comma)--warn-once)
  503. LDFLAG_SORT_COMMON:=$(if $(call check_ld,--sort-common),-Wl$(comma)--sort-common)
  504. LDFLAG_DISCARD_ALL:=$(if $(call check_ld,--discard-all),-Wl$(comma)--discard-all)
  505. LDFLAGS_NOSTRIP:=$(CPU_LDFLAGS-y) -shared \
  506. -Wl,--warn-common $(LDFLAG_WARN_ONCE) -Wl,-z,combreloc
  507. # binutils-2.16.1 warns about ignored sections, 2.16.91.0.3 and newer are ok
  508. #LDFLAGS_NOSTRIP+=$(call check_ld,--gc-sections)
  509. ifeq ($(UCLIBC_BUILD_RELRO),y)
  510. LDFLAGS_NOSTRIP+=-Wl,-z,relro
  511. endif
  512. ifeq ($(UCLIBC_BUILD_NOW),y)
  513. LDFLAGS_NOSTRIP+=-Wl,-z,now
  514. endif
  515. ifeq ($(LDSO_GNU_HASH_SUPPORT),y)
  516. # Be sure that binutils support it
  517. LDFLAGS_GNUHASH:=$(call check_ld,--hash-style=gnu)
  518. ifeq ($(LDFLAGS_GNUHASH),)
  519. ifneq ($(filter-out $(clean_targets) install_headers headers-y,$(MAKECMDGOALS)),)
  520. $(error Your binutils do not support --hash-style option, while you want to use it)
  521. endif
  522. else
  523. LDFLAGS_NOSTRIP += -Wl,$(LDFLAGS_GNUHASH)
  524. endif
  525. endif
  526. LDFLAGS:=$(LDFLAGS_NOSTRIP) -Wl,-z,defs
  527. ifeq ($(DODEBUG),y)
  528. CFLAGS += -O0 -g3 -DDEBUG
  529. else
  530. CFLAGS += $(OPTIMIZATION)
  531. endif
  532. ifeq ($(DOSTRIP),y)
  533. LDFLAGS += -Wl,-s
  534. else
  535. STRIPTOOL := true -Stripping_disabled
  536. endif
  537. ifneq ($(strip $(UCLIBC_EXTRA_CFLAGS)),"")
  538. CFLAGS += $(call qstrip,$(UCLIBC_EXTRA_CFLAGS))
  539. endif
  540. ifeq ($(DOMULTI),y)
  541. # we try to compile all sources at once into an object (IMA), but
  542. # gcc-3.3.x does not support it
  543. # gcc-3.4.x supports it, but does not need and support --combine. though fails on many sources
  544. # gcc-4.0.x supports it, supports the --combine flag, but does not need it
  545. # gcc-4.1(200506xx) supports it, but needs the --combine flag, else libs are useless
  546. ifeq ($(GCC_MAJOR_VER),3)
  547. DOMULTI:=n
  548. else
  549. CFLAGS+=$(call check_gcc,--combine,)
  550. endif
  551. else
  552. DOMULTI:=n
  553. endif
  554. ifneq ($(strip $(UCLIBC_EXTRA_LDFLAGS)),"")
  555. LDFLAGS += $(call qstrip,$(UCLIBC_EXTRA_LDFLAGS))
  556. endif
  557. ifeq ($(UCLIBC_HAS_THREADS),y)
  558. ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
  559. PTNAME := nptl
  560. CFLAGS += -DHAVE_FORCED_UNWIND
  561. else
  562. ifeq ($(LINUXTHREADS_OLD),y)
  563. PTNAME := linuxthreads.old
  564. else
  565. PTNAME := linuxthreads
  566. endif
  567. endif
  568. PTDIR := libpthread/$(PTNAME)
  569. # set up system dependencies include dirs (NOTE: order matters!)
  570. ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
  571. PTINC:= -I$(top_builddir)$(PTDIR) \
  572. -I$(top_srcdir)$(PTDIR) \
  573. $(if $(TARGET_ARCH),-I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH)/$(TARGET_SUBARCH)) \
  574. -I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH) \
  575. -I$(top_builddir)$(PTDIR)/sysdeps/$(TARGET_ARCH) \
  576. -I$(top_srcdir)$(PTDIR)/sysdeps/$(TARGET_ARCH) \
  577. -I$(top_builddir)$(PTDIR)/sysdeps/unix/sysv/linux \
  578. -I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux \
  579. -I$(top_srcdir)$(PTDIR)/sysdeps/pthread \
  580. -I$(top_srcdir)$(PTDIR)/sysdeps/pthread/bits \
  581. -I$(top_srcdir)$(PTDIR)/sysdeps/generic \
  582. -I$(top_srcdir)ldso/ldso/$(TARGET_ARCH) \
  583. -I$(top_srcdir)ldso/include
  584. #
  585. # Test for TLS if NPTL support was selected.
  586. #
  587. GCC_HAS_TLS=$(shell \
  588. echo "extern __thread int foo;" | $(CC) -o /dev/null -S -xc - 2>&1)
  589. ifneq ($(GCC_HAS_TLS),)
  590. gcc_tls_test_fail:
  591. @echo "####";
  592. @echo "#### Your compiler does not support TLS and you are trying to build uClibc";
  593. @echo "#### with NPTL support. Upgrade your binutils and gcc to versions which";
  594. @echo "#### support TLS for your architecture. Do not contact uClibc maintainers";
  595. @echo "#### about this problem.";
  596. @echo "####";
  597. @echo "#### Exiting...";
  598. @echo "####";
  599. @exit 1;
  600. endif
  601. else
  602. PTINC := \
  603. -I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH) \
  604. -I$(top_srcdir)$(PTDIR)/sysdeps/$(TARGET_ARCH) \
  605. -I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux \
  606. -I$(top_srcdir)$(PTDIR)/sysdeps/pthread \
  607. -I$(top_srcdir)$(PTDIR) \
  608. -I$(top_srcdir)libpthread
  609. endif
  610. CFLAGS+=$(PTINC)
  611. else
  612. PTNAME :=
  613. PTINC :=
  614. endif
  615. CFLAGS += -I$(top_srcdir)libc/sysdeps/linux/common
  616. CFLAGS += -I$(KERNEL_HEADERS)
  617. #CFLAGS += -iwithprefix include-fixed -iwithprefix include
  618. CC_IPREFIX := $(shell $(CC) --print-file-name=include)
  619. CC_INC := -isystem $(dir $(CC_IPREFIX))include-fixed -isystem $(CC_IPREFIX)
  620. CFLAGS += $(CC_INC)
  621. ifneq ($(DOASSERTS),y)
  622. CFLAGS+=-DNDEBUG
  623. endif
  624. ifeq ($(SYMBOL_PREFIX),_)
  625. CFLAGS+=-D__UCLIBC_UNDERSCORES__
  626. endif
  627. # Keep the check_as from being needlessly executed
  628. ifndef ASFLAGS_NOEXEC
  629. ifeq ($(UCLIBC_BUILD_NOEXECSTACK),y)
  630. export ASFLAGS_NOEXEC := $(call check_as,--noexecstack)
  631. else
  632. export ASFLAGS_NOEXEC :=
  633. endif
  634. endif
  635. ASFLAGS = $(ASFLAGS_NOEXEC)
  636. LIBGCC_CFLAGS ?= $(CFLAGS) $(CPU_CFLAGS-y)
  637. LIBGCC:=$(shell $(CC) $(LIBGCC_CFLAGS) -print-libgcc-file-name)
  638. LIBGCC_DIR:=$(dir $(LIBGCC))
  639. # moved from libpthread/linuxthreads
  640. ifeq ($(UCLIBC_CTOR_DTOR),y)
  641. SHARED_START_FILES:=$(top_builddir)lib/crti.o $(LIBGCC_DIR)crtbeginS.o
  642. SHARED_END_FILES:=$(LIBGCC_DIR)crtendS.o $(top_builddir)lib/crtn.o
  643. endif
  644. LOCAL_INSTALL_PATH := install_dir